Liquid-fuel cook stove



Dg. 24', 1929. PI K P 1,740,745 LIQUID FUEL COOK STOVE Filed Aug. 18. 1926 2 Sheets-Sheet l JYEUMZE? LIQUID FUEL COOK STOVE Q I I 1 T 25 WW I Wa 13 s4 Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE GEORGE E. PICKUP, OF NEWARK, OHIO, ASSIGNOB TO THE WEI-IRLE COMPANY, OF NEWARK, OHIO, A CORPORATION OF OHIO LIQUID-FUEL COOK STOVE Application filed August 18, 1926. Serial No. 129,895.

The invention relates to a cook stove or range of the type employing gasoline or other readily volatile fuel, and the object of the invention generally stated is to provide a stove of this character which is of a thoroughly practical character, efficient in operation, and convenient of manipulation.

A further object of the invention is to provide in a liquid fuel stove having a main generating means, a pregenerating means of an advantageous character in that it utilizes the fuel under pressure to effect a rapid conditioning of the main generating means.

Another object is to provide a pregenerating means having a jet burner connected with the source of liquid fuel, in combination with a generator therefor, adapted to be heated rapidly by the application of a relatively small external flame.

In cook stoves, it is customary to provide one large or giant burner, in combination with three relatively smaller burners, and in the case of gasoline stoves it has been cus- 5 tomary to employ the giant burner in the generation of the fuel for the other burners so that it is necessary to have the giant burner in operation when any one of the other burners is in use. Another object of my invention is to provide a giant burner having, in combination therewith, a generating means capable of supplying gas to the other burners independently of the giant burner.

The objects of the invention thus generally stated, together with other and ancillary advantages, are obtained by the preferred construction and arrangement illustrated in the accompanying drawings. It should be noted, however, that it is contemplated that various 4o changes in the construction and arrangement illustrated may be made by those skilled in the art without departing from the spirit and scope of the invention.

In the drawings,

Figure 1 is a fragmentary plan section of the upper portion of a cook stove showing the arrangement of the open top burners, an oven burner, and the generating means associated with the main or giant burner.

Fig. 2 is a similar fragmentary plan section showing the giant burner and generating means on a somewhat larger scale.

Fig. 3 is a vertical sectional view taken approximately in the line 3-3 of Fig. 2.

Fig. 4 is a plan view of a pregenerator. Fig. 5 is a transverse sectional view through the pregenerator.

Referring to Fig. 1, 7 designates generally the stove frame which may be of any suitable or preferred character providing an open topsection 8 and an oven section 9. The open top section comprises a main or giant burner 10 and three relatively smaller burners 11, 12 and 13. The oven section is provided with an oven burner 14.

A manifold generally designated by the numeral 15 is arranged to supply gas through a suitable extension 16 to the burner 10, and extensions 17, 18 and 19 supply gas to the burners l1, l2 and 13 respectively. 20 is an extension of the manifold for supplying gas to the oven burner 14.

The means for generating the fuel into a gas is associated with the giant burner 10. This burner is constructed in two substantially segmental sections 21 and 22 spaced apart but connected by means of a tubular member 23 into one end of which leads the manifold extension 16. A space is thus provided between the two sections of the burner, the tubular member 23 being disposed in a plane below the sections and leading upwardly into the bottom portions thereof. In this space between the two sections of the burner is disposed the main generator burner 24 which is elongated in form and extends rearwardly for connection with the manifold 15. This burner 24 is provided with the usual slits or jet orifices and is closed at its forward end, which terminates at the forward side of the giant burner 10.

Fuel is supplied to the manifold 15 through a generating chamber in the form of a tube 25 extending in a front to rear direction and overlying the main generator burner 24 in the space between the burner sections 21 and 22. At its rear end the generator tube 255 communicates with the manifold through the medium of an elbow 26, herein in the form of a casting. The forward end of this tube enters a fitting 27 which is connected with a pipe 28 leading to a suitable source of liquid fuel under pressure, such as is common in the art. This fitting 27 may be secured to the top frame member 29 of the stove as by means of a screw 30. The flow of fuel to the manifold 15 through the tube 25 is preferably controlled by a valve member 31 formed on the rear end of a rod 32 extending through the fitting 27 and the tube 25 and seating in a titting 33 provided in the forward end of the elbow 26. In the normal operation of the stove, that is to say after the initial or lighting operation, fuel is supplied to the generator burner 24 under the control of the valve 31, the valve operating rod or stem extending through the tube and fitting 27, and being equipped forwardly of the range with a hand Wheel 34. The liquid fuel entering the tube 25, being heated by the burner 24, becomes converted into a gas as will be readily under stood. Air is admitted to the fuel discharged into the manifold, as through an opening 26 in the under side of the elbow 26.

The initial or lighting operation necessitates a pregeneration of the gas in a pregenerating burner generally designated by the numeral 35. This pregenerating burner comprises a jet tip 36 formed at one terminal end of a coil 37 of copper tubing. The other terminal end 38 connects with a lower extension 39 of the fitting 27 and the flow of gas fuel to the coil 37 is controlled by a suitable valve 40. The coil 37 is enclosed in the present instance within a sheet metal casing 41 substantially rectangular in form but open at front and rear sides. The jet 36 is so arranged as to discharge into the open forward side of this casing and the coil 37 is disposed directly in front of this jet. Also the casing is inclined upwardly and rearwardly beneath the tube 25, the rear end of the casing terminating adja cent the space between the two burner sections 21 and 22 of the main burner 10. At the rear end of the casing the side walls carry inwardly inclined tongues 41 which serve to confine and direct the flame in its discharge against the generating tube. Struck up from the bottom wall of the casing is a lip 42 which serves as a baffle plate in the path of the projected spray or jet of fuel starting from the jet tip 36. This operates to break up the fuel into a mist for more effective combustion. Extending downwardly and forwardly from the casing isan arm 43 carrying a cup 44 which is disposed beneath the jet tip 36 and serves to collect drippings of fuel from the tip. The top wall of the casing 41 is slit substantially centrally thereof and portions are bent downwardly to form flanges 45 which serve to hold the casing in position on the coil (Fig. 5).

When it is desired to place the stove in operation, a. lighted match is applied to the under side of the casing 41, and the latter being of thin sheet metal in contact with the copper coil 37, the coil becomes quickly heated. The valve 40 is then opened slightly to permit fuel to flow under pressure into the coil and the fuel discharges from the jet tip 36 in the form of a gas which becomes ignited from the flame of the match. The flame thus produced passes through the casing and through the coil enclosed therein and strikes the under side of the generating tube 25. After a brief interval this tube 25 becomes heated sufliciently, and the valve 31 is operated by turning the hand wheel 34, thus permitting the flow of gaseous fuel into the manifold and thence to the generating burner 24. Upon issuing from the jet orifices of this burner the gas is ignited by the flame from the pregenerator, it being noted that the pregenerator. discharges directly over the generator burner 24. The valve 40 may now be operated to shut off the flow of fuel from the pregenerator, the main burner 24 operating to heat the generator tube 25. This provides an ample supply of generated gas for any or all of the burners of the stove top. As will be understood, suitable valves 46 with operating handles 47 in front of the open top section are provided to control the flow of gas from the manifold to the several burners.

I have found that with the construction and arrangement thus provided it is possible to dispense entirely with the use of alcohol or other auxiliary lighting fuel, the heat supplied from a lighted match being sufficient to generate the initial gas supply for the pregenerator, and the latter operating to produce a supply of gas for the main generator burner. Moreover, the main generator burner is not dependent for its operation upon the giant burner 10 of the stove so that any one of the open top burners, or the oven burner, may be used independently of the burner 10. If desired, the generator burner may be employed as a simmering burner in the use of the stove.

I claim as my invention:

1. In a gasoline cook stove, the combination of a manifold having a plurality of burners in valve-controlled communication therewith, one of said burners being formed in two sections spaced apart but connectedtogether, a generator tube and a generator burner disposed between said two burner sections one above the other, said generator tube being connected at one end with a source of fuel and at its other end with said manifold, and said generator burner being connected at one end with said manifold, valve means for controlling the flow of fuel to the generator burner, and a pregenerator comprising a metallic coil having valve-controlled connection at one end with the source of fuel and having a jet tip at its other end arranged to discharge into the space between said burner sections beneath the generator tube.

2. A liquid fuel cook stove comprising, in combination a manifold having a plurality of burners. a main generator connected with a source of fuel and communicating with said manifold, valve means for controlling the flow of fuel to the manifold, a pregenerator comprising a metallic coil having one end in valve-controlled communication with the source of fuel and a jet tip at its other end arranged to discharge in the direction of said generator tube, and a generator burner independent of the aforesaid burners connected with said manifold, said generator burner being disposed beneath said main generator.

3. In a liquid fuel cook stove, the combination of a manifold, a generator tube having one end adapted for connection with a source of fuel and the other end communicating with said manifold, a burner connected with the manifold and arranged to apply heat to said tube, anda pregenerator comprising a metallic coil having one end connected with the source of fuel supply and its other end arranged to discharge through the coil and against said generator tube.

4. In a liquid fuel stove of the class described, a main generator including a hollow member through which the liquid fuel is supplied, and a pregenerator for heating said member including a metallic coil also adapted for connection with the source of fuel and having a jet tip arranged to discharge against said member, and a metallic casing for said coil having an opening through said tip is arranged to discharge.

5. A liquid fuel cook stove having, in combination, a generator tube connected with a fuel supply under pressure, a pregenerator burner in valve controlled communication with the fuel supply and positioned near one end of the generator tube directly beneath it so as to direct the flame toward the generator tube to initiate the gasification of fuel therein, a manifold into which said tube is arranged to discharge, a needle valve for controlling such discharge into the manifold, a cooking burner in valve controlled communication with said manifold and disposed in a plane below said tube, so that the latter is positioned in the heat zone above said cooking burner, an auxiliary burner also connected with the manifold and having one end disposed adjacent the pregenerator burner so as to be ignited from the flame of the pregenerator burner and adapted to heat the generator tube in substantially the same region as the cooking burner, and a valve for controlling the flow of fuel to said cooking burner independently of the auxiliary burner, said auxiliary burner being adapted to continue the gasilication of fuel in said tube initiated by the pregenerator burner.

In testimony whereof, I have hereunto affixed my signature.

GEORGE E. PICKUP. 

